Metadata

Coordinates

38.22139, -121.4970944 (decimal degrees)

Elevation

1.22 m below sea level

Maps


Deployment Dates

Deployed: 2016-05-02
Removed: 2017-04-26

Sensors Deployed

  • 1 NRLITE2 (Kipp & Zonen) net radiometer mounted at 2 m above ground level
  • 2 FW3 (Campbell Scientific) fine-wire thermocouples mounted at 1.5 m above ground level
  • 2 CS616 (Campbell Scientific) volumetric water content sensors inserted at 0.13 m and 0.38 m (VW_2) below the soil surface angled downwards

Notes

  • Surface renewal sensible heat flux measurements were corrected with calibration coefficients developed between surface renewal and eddy covariance measurements at Station D13 (Roberts Island Alfalfa).
  • The net radiometer was oriented to the west to try to keep the footprint of the station within a berm in the field. It was higher than everything else so that no shading near sunrise was expected.


Photographs



Daily Evapotranspiration and Energy Balance Components

Summed daily net radiation (Rn), surface renewal derived sensible heat flux (H SR), and actual evapotranspiration (ETa SR) derived from the energy balance residual. Ground heat flux (G) was assumed negligible at the daily scale.

Columns plotted: Rn_Avg_gf_mm_Dqc, SR_aH_gf_mm_Dqc, ET_SR_gf_Dqc, ETo_mm


Daily ETa / ETo

Daily calculated ETa divided by daily ETo obtained from Spatial CIMIS.

Columns plotted: Ka_SR


Half-hourly Energy Balance Components

Average net radiation (Rn), and calibrated surface renewal derived sensible heat flux from each thermocouple (H Tc and H Tn), and the average of the sensible heat fluxes measured by each thermocouple (H SR).

Columns plotted: Rn_Avg_qc, SR_aH_qc, Tc_aH_qc, Tn_aH_qc


Half-hourly Average Uncalibrated Volumetric Water Content

Half-hourly Average uncalibrated volumetric water content measured by each CS616. Default calibration coefficients given by the instrument manufacturer were applied but lead to unrealistically high VWC seen here. This is likely due to differences between soils in the Delta and the soils the calibration was developed for. Processing of gravimetric moisture measurements that will be used to develop site specific calibrations are still ongoing. Nevertheless, the values presented here give a rough qualitative indication of relative changes in moisture over time and with depth.

Columns plotted: VW_1_qc, VW_2_qc


Half-hourly Average Temperature

Half-hourly Average temperature measured by each thermocouple (Tc and Tn) and by the internal datalogger reference.
Columns plotted: Tpanel_qc, Tc0_Avg_qc, Tn0_Avg_qc


Half-hourly Average Battery Voltage

Half-hourly datalogger battery voltage.

Columns plotted: BattVolt_Avg